Varactor diodes are our varicaps of today. This circuit for switching signals in an RF circuit was found in a Radio Electronics magazine from July 1982.
This circuit was found in a 1986 documentation. The circuit has a common configuration with the...
This circuit causes a relay to oscillate generating a signal that turns into high voltage in a...
Found in a magazine 73 for radio amateurs of the 90s, this circuit converts a continuous voltage and...